Improvement in furnaces foe burning saw-dust



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WRIGHT DURYEA, OF GLEN COVE, NEW YORK, AND WILLIAM ENNIS, OF

HUDSON, NEW JERSEY,

Letters Patent 1Y0. 64,2974, dated' April 30, 1867.

IMPROVEMENT IN 'FURNAGES FOR BURNING SAW-DUST, te.

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TO ALL WHOM IT MAS.r GONCERN:

Be it known that WQVRIGHT DURYEA, of Glen Cove, in the county of Queens, and State of New York, and WILLIAM ENNIS, of Hudson, in the county of Hudson, and'State of New Jersey, have invented a certain new and useful Improvement on Heat" Generators, Furnaces, or Stoves, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification, :md in Which- Figures 1 and 2 represent vertical sections, at right angles to each other, of a heat generator, constructed according to our improvement; and

Figure 3, a plan of the saine.

Like letters indicate like parts throughout the several igures.

Our improvement, which, asn. heat generator, is applicable to a variety of purposes, has .reference to the burning of coal-dust, waste peat, saw-dust, spent tan, or other similar or refuse materials7 by means of a furnace or. fire-chamber, with its pertaining parts similar, so far astheir general character is concerned, to that or those described in Letters Patent of the United States issued to Joseph Heindle, assignee of Ferdinand Braun, bearing date May 17, 1864, but dilfering therefrom in several important particulars or details, the nature of our improvement consisting in a novel combination of perforated conical fire-pot or chamber, with a domeshaped reflector or top, shaking grate, and regulating plate or valve, controlling the feed apertures of the fuel to the tire-pot. Also, in combination with a grate or fire-chamber of the character described, of passages for burning or utilizing the carbonio oxide, by the introduction of atmospheric air above the fire and below the dome or roof. A

Referring to the accompanying drawing, A represents the outer shell or case of the' generator, built or made of any suitable material andsize, according to the purpose for which it is designed, and which may be simply for supplying hot air for heating buildingsffor steam boiler or other purposes. Said case is or may be of circular form, its upper portion above the. dome-shaped roof (1 and filling or b1'icl{-worlr, Zi, serving as a drying and storing receptacle or supply-chamber for the loose fuel, by feed passages ortubes, c, to the conical firechamber B. A regulating1plate, or valve, C, having openingsv in it corresponding to theY feed passages c, and made capable of a horizontal vibratory nlotion through a handle, d, is arranged above the filling to shut oif and open or regulate the supply o f-the fuel-from the drying-chamber above to the fire-pot or chamber B. This conical iirechamber has a'series of perforations, c, made in it, to facilitate the admission of air to effect combustion, which is sensibly aided, in using fuel of the description mentioned, by the dome-shaped reflector or arched roof a, while larger air inlets, j', arranged intcrmediately'and below the fuel tubes c, answer to admit; air above the fire and below the dome, for burning the carbonio oxide, while, by their arrangement, they fail to pass olf unconsumed the loose fuel entering by the tubes c. Said fire-chamber B is also Vprovided with a shaking and, it may be, dumping grate, D, for aiding not only in clearing thc fire and maintaining the requisite draught, but for, by agitating it, working down the fuel and keeping up the run or supply of the same to and down the conical sides of the fire-pot from the fuel-drying and storing receptacle above.

Such a construction and combinationof parts We find from experience mostadvantagcous Ior burning fuel of the character here mentioned. The other parts or details not hereinbefore described, but represented in the drawing,'consist of the ashpit g, opening L, designed to be closed by ya door after the re has been fairly started, and smoke outlet Y What We claim as our invention, and desire te secure by Letters Patent, is

1. The combination of the perforated conical l{ire-pot or Achamber B, with its dome-shaped roof a, and shaking grate D, fuel-feeding'tubes or passages c, communicating with a drying-chamber or receptacle above. and regulating-plate or valve C, substantially as specified. v

2. 'lhc combinution,with the {irc-chamber B, and fuel-supply'passages e, of the air inlets j, arranged relatively to the passages @Lund dome fr, essentially as herein set forth.

VRIGll'l URYEA, WILLIAM ENN S.

Witnesses.

J. W. CooMns, G. W. Renn 

